Literature. THE PRAKAIPET INDHUSOPHON STAMP COLLECTION OF SIAM. Hardbound in slipcase. The 1989 issue written in Thai. THE COLLECTION OF CHAMPIONSHIP CLASS; A STUDY OF THAI MAIL 1688 - THE END OF KING CHULALONGKORN ERA by Anatchai Rattakul. Hardbound (1989). Both volymes in perfect condition, as new. (2).